Windowless cassette



FIG. 1 is a perspective view of a windwowless cassette showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof taken from the left side of FIG. 1;

FIG. 5 is a side elevational view of the side of the cassette opposite the side shown in FIG. 4;

FIG. 6 is a top plan view of said cassette; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a windowless cassette, as shown and described. 